Page 67 – WX1BOX – Amateur Radio Station at NWS Boston/Norton

Storm Coordination Message #2 – Wednesday Evening 10/9/19-Friday 10/11/19 Coastal Storm Potential

October 9, 2019 Rob Macedo

Hello to all…

..Long Duration Coastal Storm to Affect Southern New England starting late Wednesday Afternoon with some strong winds in gusts to around 40 MPH with stronger and more damaging winds, heavy rainfall and coastal flooding possible to likely particularly in Southeast New England Thursday into Friday..
..A High Wind Warning is now in effect from 2 AM Thursday Morning through 600 AM Friday Morning for Cape Cod and the Islands for sustained winds of 30-40 MPH with gusts to 60 MPH and isolated higher gusts likely. A Wind Advisory is in effect for Eastern Plymouth County Massachusetts from 2 AM Thursday Morning through 6 AM Friday Morning for sustained winds of 25-35 MPH with gusts to 50 MPH. These winds could cause isolated to scattered pockets of tree and wire damage and isolated to scattered power outages. Other coastal areas near the High Wind Warning and Wind Advisory areas should closely monitor the strong to damaging wind potential with wind gusts of 40-45 MPH possible in areas closest to the wind headlines..
..A Coastal Flood Advisory is in effect for Nantucket from 9 AM-12 PM Thursday for the Thursday Morning high tide cycle for the potential of minor coastal flooding at the time of the Thursday Morning high tide cycle..
..A Coastal Flood Watch remains in effect from Thursday Evening through late Thursday Night for Eastern Plymouth County Massachusetts and Cape Cod and the Islands from Thursday Evening through late Thursday Night for the potential of minor to moderate coastal flooding at the time of high tide Thursday Night..
..A Flood Watch is in effect for all of Southeast Massachusetts including Cape Cod and the Islands and Norfolk and Suffolk Counties of Massachusetts for a widespread 3-6″ of rain. Isolated higher amounts of up to 8″ are possible on Cape Cod and Plymouth County of Massachusetts with even some localized 10″ amounts possible. This will result in the potential for urban and poor drainage flooding and possibly small river and stream flooding..
..SKYWARN Self-Activation is likely with this storm with Amateur Radio Call-Up Nets centered in Southeast Massachusetts. Ops at NWS Boston/Norton are possible during the day Thursday..

A long duration coastal storm is expected to affect Southern New England starting Wednesday Evening through Friday. The headlines depict the latest thinking with a conversion of the High Wind Watch to a High Wind Warning for Cape Cod and the Islands and a Wind Advisory for Eastern Plymouth County Massachusetts and a Flood Watch now posted for Southeast Massachusetts. Key factors for this long duration storm is as follows:

1.) The storm intensity and interaction of the storm with high pressure to the north and the strength and area affected for strong to damaging winds. At this time the strongest winds are expected in Eastern Plymouth County Massachusetts and Cape Cod and the Islands. Coastal and perhaps some southeastern interior areas should closely monitor the progress of the strong to damaging winds. A closer track to the area could allow those winds to get stronger in those areas. With the expected very wet ground and stronger winds, the wind damage potential will bear watching.
2.) The storm track has held steady but all models are depicting the potential for very heavy rainfall for Southeast Massachusetts and the Flood Watch has been issued for that reason. Rainfall reports over the entire storm will be needed and flooding of urban and poor drainage areas are likely and perhaps also affecting rivers and small streams as well.
3.) The storm effects will last into Friday for both strong to damaging winds, heavy rainfall and coastal flooding and this will be covered in future coordination messages. The worst conditions at this time are expected on Thursday during the day and at night.
4.) While astronomical tides are low, wave action and the possibility for multiple high tide cycles of strong to damaging winds, building seas and waves will allow for some minor to moderate coastal flooding in the north and east facing areas of Eastern Plymouth County Massachusetts and Cape Cod and the Islands. This is another aspect that will bear watching. It is noted the Thursday Morning high tide could bring minor coastal flooding to Nantucket and a Coastal Flood Advisory is now in effect for that high tide for Nantucket.

SKYWARN Activation with Ops at NWS Boston/Norton are possible during the day Thursday. Another coordination message will be posted by 6 AM Thursday Morning. Below is the NWS Boston/Norton High Wind Warning/Wind Advisory Statement, Coastal Flood Advisory/Watch Statement, Flood Watch Statement, Hazardous Weather Outlook and Enhanced Hazardous Weather Outlook:

NWS Boston/Norton High Wind Warning/Wind Advisory Statement:
https://kamala.cod.edu/ma/latest.wwus71.KBOX.html

NWS Boston/Norton Coastal Flood Advisory/Watch Statement:
https://kamala.cod.edu/ma/latest.whus41.KBOX.html

NWS Boston/Norton Flood Watch Statement:
https://kamala.cod.edu/ma/latest.wgus61.KBOX.html

NWS Boston/Norton Hazardous Weather Outlook:
https://kamala.cod.edu/ma/latest.flus41.KBOX.html

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/box/ehwo

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875 (After 6 PM)
Home/Data #: (508) 997-4503 (After 6 PM)
Work Phone #: 508-346-2929 (8 AM-5 PM)
Email Address: rmacedo@rcn.com
http://ares.ema.arrl.org
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Storm Coordination Message #1 – Late Wednesday Afternoon 10/9/19-Friday 10/11/19 Coastal Storm Potential

October 9, 2019 Rob Macedo

Hello to all…

A long duration coastal storm is expected to affect Southern New England starting late Wednesday Afternoon and lasting through Thursday Night and possibly into Friday. The headlines depict the latest thinking. Key factors for this long duration storm is as follows:

1.) The storm intensity and interaction of the storm with high pressure to the north and the strength and area affected for strong to damaging winds.
2.) The storm track which has been closer to Southern New England in recent model trends which could result in heavier rainfall in Southeast New England and the potential for stronger and more damaging winds in southeast New England with stronger winds potentially extending further north in Southern New England.
3.) The storm effects could last into Friday for both strong to damaging winds, heavy rainfall and coastal flooding and this will be covered in future coordination messages.
4.) While astronomical tides are low, wave action and the possibility for multiple high tide cycles of strong to damaging winds, building seas and waves will allow for some minor to moderate coastal flooding in the north and east facing areas of Eastern Plymouth County Massachusetts and Cape Cod and the Islands. This is another aspect that will bear watching.

SKYWARN Activation with Ops at NWS Boston/Norton are possible during the day Thursday. Another coordination message will be posted by 11 AM Wednesday Morning. Below is the NWS Boston/Norton High Wind Watch Statement, Coastal Flood Watch Statement, Hazardous Weather Outlook and Enhanced Hazardous Weather Outlook:

NWS Boston/Norton High Wind Watch Statement:
https://kamala.cod.edu/ma/latest.wwus71.KBOX.html

NWS Boston/Norton Coastal Flood Watch Statement:
https://kamala.cod.edu/ma/latest.whus41.KBOX.html

NWS Boston/Norton Hazardous Weather Outlook:
https://kamala.cod.edu/ma/latest.flus41.KBOX.html

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/box/ehwo

Respectfully Submitted,

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Severe Weather Coordination Message #1 – Thursday 9/26/19 Severe Weather Potential

September 26, 2019 Rob Macedo

Hello to all…

..Strong Wind Gusts in convective heavier showers and isolated strong to possibly even a severe thunderstorm is possible across Southern New England late this afternoon through early this evening. Lightning and other risks are low but strong winds in the upper level of the atmosphere and ahead of a cold front and any convective showers and thunderstorms may allow for strong winds to transport down to the surface allowing for isolated tree and power line damage and isolated power outages..
..The Storm Prediction Center (SPC) has placed parts of Connecticut, Rhode Island and Southeast Massachusetts in a marginal risk for severe weather today..
..SKYWARN Self-Activation will monitor this potential for late Thursday Afternoon and evening. This will be the only coordination message posted on this potential unless a significant upgrade to the situation occurs and time allows for an update. Below is the NWS Boston/Norton Hazardous Weather Outlook, Enhanced Hazardous Weather Outlook and SPC Day-1 Convective Outlook..

NWS Boston/Norton Hazardous Weather Outlook:
https://kamala.cod.edu/ma/latest.flus41.KBOX.html

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/box/ehwo

SPC Day-1 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/day1otlk.html

Respectfully Submitted,

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Hurricane Dorian Coordination Message #2 – Late Friday Night 9/6/19-Saturday 9/7/19 Tropical Storm Conditions on Cape Cod and the Islands

September 6, 2019 Rob Macedo

Hello to all…

..Hurricane Dorian is expected to pass southeast of Nantucket Island late Friday Night into early Saturday Morning. The track will bring a period of strong to damaging winds and heavy rainfall to Cape Cod and the Islands during this timeframe with high surf and rip currents over portions of the Southern New England coast..
..A Tropical Storm Warning is in effect for Cape Cod and the Islands for the potential of sustained winds of 30-40 MPH with gusts to 50-60 MPH. These winds could cause isolated to scattered pockets of tree and wire damage and isolated power outages along with minor coastal flooding particularly around Nantucket. There is the potential for 1-4″ of rain in the Tropical Storm Warning area with the worst conditions between 2 AM-12 PM Saturday..
..Areas of Southeast New England nearest the tropical storm warning area may see wind gusts to 30-40 MPH and up to 1.5″ of rain. There is also the possibility of a band of rainfall in Western New England that could produce up to 1″ of rain not directly associated with Dorian..
..Track uncertainty of around 50 miles is still present. A track closer to the coast would mean somewhat higher impacts in the tropical storm warning area and perhaps stronger impacts north and west of the current Tropical Storm Warning area. A track further offshore would confine tropical storm impacts to Nantucket Island Massachusetts..
..A High Surf Advisory is in effect from 4 PM Friday Afternoon through 6 PM Saturday Evening for South Coastal Massachusetts and Rhode Island and from 6 AM-6 PM Saturday for Eastern Essex and Eastern Plymouth Counties of Massachusetts..
..SKYWARN Self-Activation will monitor for tropical storm conditions on Cape Cod and Islands. The 146.955-Barnstable Repeater will be monitored during this tropical storm event. It is noted that these impacts will be similar to a quick hitting nor’easter. The hurricane will remain offshore so hurricane conditions are not expected..

Hurricane Dorian is expected to track southeast of Nantucket Island Late Friday Night into Saturday Morning. This will result in tropical storm conditions over Cape Cod and the Islands where a Tropical Storm Warning is now in effect. The headlines depict the current thinking. Key factors remain as follows:

1.) Eventual track of Dorian. As stated in the headlines, the track uncertainty is about 50 miles and a slightly closer track by this amount may allow for slightly stronger tropical storm force conditions over Cape Cod and the Islands and could extend those conditions a little further north and west while a track 50 miles further offshore would mean impacts confined to Nantucket Island.
2.) The hurricane combined with strong high pressure along with warm ocean temperatures and slightly cooler air aloft has the potential to allow for an expanding wind gradient that will support the stronger wind gusts that our tropical storm strength in the watch area if Dorian’s track is close enough.

SKYWARN Self-Activation will monitor for tropical storm conditions on Cape Cod and Islands. The 146.955-Barnstable Repeater will be monitored during this tropical storm event. It is noted that these impacts will be similar to a quick hitting nor’easter. The hurricane will remain offshore so hurricane conditions are not expected. This will likely be the last coordination message on Dorian unless a significant upgrade to the situation occurs and time allows for an update. Below is the NWS Boston/Norton Local Statement, High Surf Advisory Statement, Hazardous Weather Outlook, Enhanced Hazardous Weather Outlook and National Hurricane Center (NHC) advisory package:

NWS Boston/Norton – Local Statement:
https://kamala.cod.edu/ma/latest.wtus81.KBOX.html

NWS Boston/Norton – High Surf Advisory Statement:
https://kamala.cod.edu/ma/latest.whus41.KBOX.html

NWS Boston/Norton Hazardous Weather Outlook:
http://kamala.cod.edu/ma/latest.flus41.KBOX.html

NWS Boston/Norton Experimental Enhanced Hazardous Weather Outlook:
https://www.weather.gov/box/ehwo

National Hurricane Center – Miami Florida Information:

Hurricane Dorian Public Advisory Information:
https://kamala.cod.edu/TPC/latest.wtnt35.KNHC.html

Hurricane Dorian Technical Discussion Information:
https://kamala.cod.edu/TPC/latest.wtnt45.KNHC.html

Hurricane Dorian Forecast/Advisory Information:
https://kamala.cod.edu/TPC/latest.wtnt25.KNHC.html

Hurricane Dorian Wind Speed Probabilities:
https://kamala.cod.edu/TPC/latest.font15.KNHC.html

Respectfully Submitted,

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Hurricane Dorian Coordination Message #1 – Friday Night 9/6/19-Early Saturday Morning 9/7/19 Tropical Storm Conditions on Cape and Islands

September 5, 2019 Rob Macedo

Hello to all…

..Hurricane Dorian is expected to pass southeast of Nantucket Island late Friday Night into early Saturday Morning. The track may bring a period of strong to damaging winds and heavy rainfall to Cape Cod and the Islands during this timeframe..
..A Tropical Storm Watch is in effect for Cape Cod and the Islands for the potential of sustained winds of 30-40 MPH with gusts to 50-60 MPH. These winds could cause isolated to scattered pockets of tree and wire damage and isolated power outages along with minor coastal flooding particularly around Nantucket. There could also be the potential for 1-4″ of rain in the Tropical Storm Watch area..
..Areas of Southeast New England nearest the tropical storm watch area may see wind gusts to 30-40 MPH and up to 1″ of rain..
..Track uncertainty of around 50 miles is still present. A track closer to the coast would mean somewhat higher impacts in the tropical storm watch area and perhaps stronger impacts north and west of the current Tropical Storm Watch area. A track further offshore would confine tropical storm impacts to Nantucket Island Massachusetts..
..SKYWARN Self-Activation will monitor for tropical storm conditions on Cape Cod and Islands. It is noted that these impacts will be similar to a quick hitting nor’easter. The hurricane will remain offshore so hurricane conditions are not expected..

Hurricane Dorian is expected to track southeast of Nantucket Island Late Friday Night into Saturday Morning. This will potentially result in tropical storm conditions over Cape Cod and the Islands. The headlines depict the current thinking. Key factors includes:

SKYWARN Self-Activation will monitor for tropical storm conditions on Cape Cod and Islands. It is noted that these impacts will be similar to a quick hitting nor’easter. The hurricane will remain offshore so hurricane conditions are not expected. Another coordination message will be posted Thursday Evening or Friday Morning depending on any change to the Tropical Storm Watches for the Cape and Islands. Below is the NWS Boston/Norton Local Statement, Hazardous Weather Outlook, Enhanced Hazardous Weather Outlook and National Hurricane Center (NHC) advisory package:

NWS Boston/Norton – Local Statement:
https://kamala.cod.edu/ma/latest.wtus81.KBOX.html

NWS Boston/Norton Hazardous Weather Outlook:
http://kamala.cod.edu/ma/latest.flus41.KBOX.html

NWS Boston/Norton Experimental Enhanced Hazardous Weather Outlook:
https://www.weather.gov/box/ehwo

National Hurricane Center – Miami Florida Information:

Hurricane Dorian Public Advisory Information:
https://kamala.cod.edu/TPC/latest.wtnt35.KNHC.html

Hurricane Dorian Technical Discussion Information:
https://kamala.cod.edu/TPC/latest.wtnt45.KNHC.html

Hurricane Dorian Forecast/Advisory Information:
https://kamala.cod.edu/TPC/latest.wtnt25.KNHC.html

Hurricane Dorian Wind Speed Probabilities:
https://kamala.cod.edu/TPC/latest.font15.KNHC.html

Respectfully Submitted,

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Severe Weather Coordination Message #2 – Wednesday 9/4/19 Severe Weather Potential

September 4, 2019 Rob Macedo

Hello to all…

..Isolated to scattered strong to severe thunderstorms are likely from north and west of a Boston to Providence line through much of Southern New England. Strong to damaging winds, heavy rainfall leading to urban and poor drainage flooding are the main threats but there is also a secondary risk of large hail and an isolated tornado..
..The Storm Prediction Center (SPC) has placed much of Southern New England from Windham County Connecticut, Middlesex, and western Essex counties of Massachusetts north and west in a slight risk for severe weather with a marginal risk for severe weather in Southeast New England except for Cape Cod and the Islands..
..Timeframe for severe weather is expected to be between 2-9 PM Wednesday and a Mesoscale Convective Discussion has been issued indicating an 80% chance of a watch for much of Southern New England.
..SKYWARN Activation with Ops at NWS Boston/Norton is likely between 1-2 PM Wednesday Afternoon..

Clearing is occurring across much of the marginal and slight risk areas late this morning allowing for increased instability. There will be strong winds aloft above what is required for severe weather potential with strong forcing and a trigger with a cold front in the region. The extent of the severe weather potential will be based on the level of instability. There will also be some turning in the atmosphere which may allow for an isolated tornado and large hail risk. Given the clearing trend and if it continues, this may allow for a fairly potent severe weather event particularly in the slight risk severe weather area and will be monitored closely. The headlines of the message depict the current thinking.

SKYWARN Activation with Ops at NWS Boston/Norton is likely between 1-2 PM Wednesday Afternoon. This will be the last coordination message on this event as we shift into operations mode. Below is the NWS Boston/Norton Hazardous Weather Outlook, Enhanced Hazardous Weather Outlook, SPC Mesoscale Convective Discussion, and SPC Day-1 Convective Outlook..

NWS Boston/Norton Hazardous Weather Outlook:
https://kamala.cod.edu/ma/latest.flus41.KBOX.html

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/box/ehwo

SPC Mesoscale Convective Discussion #1924:
https://www.spc.noaa.gov/products/md/md1924.html

SPC Day-1 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/day1otlk.html

Respectfully Submitted,

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Severe Weather Coordination Message #1 – Wednesday 9/4/19 Severe Weather Potential

September 4, 2019 Rob Macedo

Hello to all…

..Isolated to scattered strong to severe thunderstorms are possible from north and west of a Boston to Providence line north and west across much of Southern New England. Strong to damaging winds, heavy rainfall leading to urban and poor drainage flooding are the main threats but there is also a low risk of large hail and an isolated tornado..
..The Storm Prediction Center (SPC) has placed much of Southern New England northwest of a Boston to Providence line through Eastern New York and Northern New England in a marginal risk for severe weather with the potential of an upgrade to slight risk in later outlooks if more instability materializes. Timeframe for severe weather is expected to be between 1-9 PM Wednesday..
..SKYWARN Activation with Ops at NWS Boston/Norton is likely by 1 PM Wednesday Afternoon. A more complete coordination message will be posted by 1000 AM Wednesday Morning on Wednesday’s severe weather potential. Below is the NWS Boston/Norton Hazardous Weather Outlook, Enhanced Hazardous Weather Outlook and SPC Day-2 Convective Outlook..

NWS Boston/Norton Hazardous Weather Outlook:
https://kamala.cod.edu/ma/latest.flus41.KBOX.html

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/box/ehwo

SPC Day-2 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/archive/2019/day2otlk_20190903_1730.html

Respectfully Submitted,

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Storm Coordination Message #1 – Wednesday Night 8/28/19-Thursday Morning 8/29/19 – Flash Flood/Heavy Rainfall Potential

August 28, 2019 Rob Macedo

Hello to all…

..A cold front moving across New England late Wednesday Afternoon through Thursday Morning coupled with moisture from offshore Tropical Depression Erin will set the stage for widespread general rainfall and the potential for flash flooding of urban and poor drainage areas and possibly some small streams. A Flash Flood Watch is in effect for Central and Eastern Massachusetts and Rhode Island through late Wednesday Night for 2-4″ of rainfall with localized amounts of up to 5″ possible. Western areas should monitor but are expected to receive less rainfall..
..An isolated strong to severe thunderstorm with strong to damaging wind, frequent lightning and heavy downpours cannot be ruled out during the evening and overnight hours..
..SKYWARN Activation with Ops at NWS Boston/Norton will commence by 530 PM EDT Wednesday Evening through late tonight to monitor flash flooding and any isolated severe weather potential..

A cold front approaching from New York State will move its way through New England tonight and tap into a moisture feed from Tropical Depression Erin to bring heavy downpours and perhaps a few embedded thunderstorms to the area. The headlines depict the current thinking regarding heavy rainfall and flood potential. Key factors include:

1.) Whether any heavy training rainfall will track over a given area to result in the higher end rainfall amounts.
2.) Whether any heavy training rainfall will track over vulnerable urban areas or areas of more flashy small streams/rivers.
3.) Any thunderstorm development that enhances heavy rainfall.

SKYWARN Activation with Ops at NWS Boston/Norton will commence by 530 PM EDT Wednesday Evening through late tonight to monitor flash flooding and any isolated severe weather potential. Below is the NWS Boston/Norton Flash Flood Watch Statement, Hazardous Weather Outlook and Enhanced Hazardous Weather Outlook:

NWS Boston/Norton Flash Flood Watch Statement:
https://kamala.cod.edu/ma/latest.wgus61.KBOX.html

NWS Boston/Norton Hazardous Weather Outlook:
https://kamala.cod.edu/ma/latest.flus41.KBOX.html

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/box/ehwo

Respectfully Submitted,

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Special Announcement: Mish Michaels Presentation on Cape Cod Tornadoes – SKYWARN Training – ARES SEC Forum and High-Level SKYWARN Overview at Northeast HamXposition in Boxboro Mass Friday 9/6/19-Sunday 9/8/19

August 27, 2019 Rob Macedo

Hello to all…

At the Northeast HamXposition – ARRL New England Division Amateur Radio Convention in Boxboro, Massachusetts, there will be a number of interesting presentations regarding weather, SKYWARN, including a SKYWARN Training session Friday 9/6/19 from 200-430 PM and ARES at the convention and an ARES/RACES/SKYWARN booth to ask questions of ARES, SKYWARN Coordinators. The Northeast HamXposition runs Friday 9/6/19-Sunday 9/8/19. Here are some of the presentations of most interest to those on the SKYWARN Announcement email list:

Friday 9/6/19:
1000 AM-1050 AM: Importance of SKYWARN Reporting and how it supported the Cape Cod Tornado Assessment
1100 AM-1150 AM: Fundamentals of NVIS in EMCOMM
1100 AM-1250 PM: Traffic Handling Practices for Emergency Communications
1200 PM-1250 PM: Go-Kit Basics
100-150 PM: Emergency Communications in a Major Disaster: Puerto Rico and Others
200-430 PM: SKYWARN Training (This is the full training class and will get you a Spotter ID card if a newly trained spotter or count for a renewal of your SKYWARN Training)
200-500 PM: NBEMS and Winlink

Anyone wishing to attend these presentations on Friday 9/6/19 can do so free of charge.

Saturday 9/7/19:
900 AM-1050 AM: New England Section Emergency Coordinator Forum
1100 AM-1150 AM: An Introduction to Traffic Handling & Being a Net Control Station
1200 PM-1250 PM: National Traffic System Seminar

Sunday 9/8/19:
900 AM-950 AM: SKYWARN & VoIP Hurricane Net Overview
1000 AM-1050 AM: MARS Overview

There will be many other Amateur Radio related presentations at the Northeast Hamxposition at Boxboro. For a complete list of the forums, check out the following link at the hamxposition.org web site:
https://hamxposition.org/forums-and-classes/forum-schedule

Also, for anyone interested in obtaining their Amateur Radio license, there will be a technician-in-a-day course sponsored by the Cape Ann Amateur Radio Association on Saturday 9/7/19 from 9 AM-5 PM. The details on registration can be found via the following link:
https://hamxposition.org/tech-in-a-day

We hope to see many of you at the Northeast HamXposition, ARRL New England Division Convention in Boxboro, Massachusetts. Thanks to all for their support!

Respectfully Submitted,

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Severe Weather Coordination Message #2 – Wednesday 8/21/19 Severe Weather Potential

August 21, 2019 Rob Macedo

Hello to all…

..Isolated to Scattered Strong to Severe Thunderstorms are likely this Wednesday Afternoon and Evening, 8/21/19, across much of Southern New England particularly along and north of the Boston to Providence line. Strong to damaging winds, hail, frequent lightning and heavy rainfall leading to urban and poor drainage flooding to flash flooding are the main threats with the main timeframe between 2-9 PM EDT Wednesday..
..The Storm Prediction Center (SPC) has placed all of Southern New England in a slight risk for severe weather which is a slight expansion in the risk area since last night..
..SKYWARN Activation with Ops at NWS Boston/Norton will commence by 2 PM EDT Wednesday to monitor severe weather potential..

A warm front is pushing its way through Southern New England this morning. There has been some cloud cover and some showers and thunderstorms with this warm front but satellite imagery and radar indicates clearing behind this activity. The severe weather with this late morning/early afternoon activity is low but an isolated strong to severe thunderstorm is possible with this activity. Most models continue to take this warm front through the area through early afternoon with clearing behind it setting the stage for a favorable environment for severe weather potential across the region with sufficient wind shear profiles and significant heating for destabilization and high instability with a trigger in an approaching cold front. The potential for a reasonable amount of strong to severe thunderstorms is likely though we will continue to monitor how active the warm front is and how quickly the cloud cover moves out of the area. The timeframe for increased coverage of strong to severe thunderstorm activity after the original activity is after 2-3 PM this afternoon through about 9 PM EDT this Wednesday Evening. The headlines of the message depict the current thinking.

SKYWARN Activation with Ops at NWS Boston/Norton will commence by 2 PM EDT Wednesday to monitor severe weather potential. This will be the final coordination message as we move into Amateur Radio Ops mode. Below is the NWS Boston/Norton Special Weather Statement, Hazardous Weather Outlook, Enhanced Hazardous Weather Outlook and SPC Day-1 Convective Outlook:

NWS Boston/Norton Special Weather Statement – Severe Weather Potential:
https://kamala.cod.edu/offs/KBOX/1908210852.wwus81.html

NWS Boston/Norton Hazardous Weather Outlook:
https://kamala.cod.edu/ma/latest.flus41.KBOX.html

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/box/ehwo

SPC Day-1 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/day1otlk.html

Respectfully Submitted,

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